Semi-automatic cannulation device or manually triggered self-propelled catheter cannulation device

Abstract

An improved intravascular catheter placement device including a hollow needle, an intravascular catheter concentric with said hollow needle, a chamber in communication with said hollow needle wherein the pressure within said chamber is a manually created vacuum pressure. A self-propelling apparatus is also included for moving said catheter into a blood vessel upon sensing penetration of the wall of the blood vessel by the tip of the hollow needle.

What is claimed is: 
     
       1. An intravascular catheter device for insertion of an intravascular catheter into an interior of a blood vessel comprising: an intravascular catheter;   a hollow needle concentric and within said catheter;   a chamber being in communication with said hollow needle;   means for creation of a vacuum pressure within said chamber, said means for creation of said vacuum pressure being manually operable to create said vacuum;   means for self-propelled advancement of said intravascular catheter into the interior of the blood vessel; and   means for actuating said means for self-propelled advancement of said catheter into the interior of the blood vessel upon backflow of blood occurring upon blood vessel penetration, said blood being drawn by said vacuum pressure toward said chamber, said actuating means being manually actuable.   
     
     
       2. An intravascular catheter device for insertion of an intravascular catheter into an interior of a blood vessel comprising: an intravascular catheter;   a hollow needle concentric and within said catheter;   a chamber being in communication with said hollow needle having a vacuum pressure;   means for self-propelled advancement of said intravascular catheter into the interior of the blood vessel; and   means for actuating said means for self-propelled advancement of said catheter into the interior of a blood vessel upon backflow of blood occurring upon blood vessel penetration, said blood being drawn by said vacuum pressure toward said chamber, said actuating means comprising a piston member slideably mounted within said vacuum chamber, said piston member being manually displaceable.   
     
     
       3. An intravascular catheter device for insertion of an intravascular catheter into an interior of a blood vessel comprising: an intravascular catheter;   a hollow needle concentric and within said catheter;   a chamber for a vacuum pressure, said chamber being in communication with said hollow needle;   a vacuum creating piston slideably mounted within said chamber, said piston being manually displaceable to create said vacuum:   means for self-propelled advancement of said intravascular catheter into the interior of the blood vessel; and   means for actuating said means for self-propelled advancement of said catheter into the interior of the blood vessel upon backflow of blood occurring upon blood vessel penetration, said blood being drawn by said vacuum pressure toward said chamber, said actuating means comprising said piston slidably mounted within said vacuum chamber, said piston being manually displaceable to actuate said means for self-propelled advancement.   
     
     
       4. The device of claim 3, wherein: said piston member has a handle means for manual withdrawal.   
     
     
       5. The device of claim 3 further comprising: an intermediate member, interposed between said means for self propelled advancement and said intravascular catheter and   an intermediate member chamber, wherein said intermediate member is slideably mounted, said intermediate member chamber being adjacent to said vacuum chamber.